Re: DO Dra

Dear Tonny,

    Sorry, it is beyond my capability (capacity) to send a copy of the
article.  I would be grateful if you can consult your library.

    The amplitude of the oscillation (this case, DQ Her-type oscillation)
is usually very small, and most of its power is detected in shorter
wavelengths (U and B bands).  So you need not to be disappointed if you
can not detect it visually.  However, major flare or flickering have
good chance to be detected visually, and equally very important.

Regards,
Taichi Kato